Oil-resistant polytetrafluoroethylene power cable

Abstract

The utility model discloses an oil-resistant polytetrafluoroethylene power cable, which relates to the field of power cables and comprises a cable core. Three groups of spirally wound wire cores are arranged in the cable core, each wire core is composed of a conductor, a middle layer and an alloy layer, an insulating composite layer is arranged outside the cable core, each insulating composite layer is composed of a base layer, a reinforcing layer and an inner protection layer, a shielding combination layer is arranged outside the insulating composite layer, and a shielding layer is arranged outside the shielding combination layer. The shielding combination layer is composed of an anti-interference layer, an isolation layer and a strengthening layer, an outer sheath is arranged outside the shielding combination layer, and according to the scheme, the problem that the oil resistance of the power cable is poor is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, in particular to an oil-resistant polytetrafluoroethylene power cable. Background Art

[0002] Power cables are used to transmit and distribute high-power electrical energy in power systems. They possess excellent electrical conductivity, insulation, and transmission characteristics, and typically consist of four components: a core (conductor), an insulation layer, a shielding layer, and a protective layer. Power cables can withstand high, even extremely high, operating voltages for extended periods and transmit large currents. They offer advantages such as minimal footprint, high reliability, minimal maintenance, and reduced risk of electric shock. They are widely used in urban underground power grids, power station outbound lines, internal power supplies for industrial and mining enterprises, and underwater transmission lines crossing rivers and seas.

[0003] For example, the Chinese authorized patent "A Power Cable" with announcement number CN209880242U includes a sheath, a steel belt, an insulation layer, a waterproof layer, an anti-stretching structure, a limit rod, a cable, and a bushing. The steel belt is embedded and installed inside the sheath, the insulation layer is wrapped on the outer surface of the steel belt, the outer surface of the waterproof layer is in contact with the inner surface of the insulation layer, and the anti-stretching structure is embedded and installed inside the waterproof layer. The anti-stretching structure is structurally provided. When bending is required, the inner rubber sleeve deforms due to its own elasticity and squeezes the buffer layer. At this time, further buffering will be performed and the force will be transmitted to the inner lining layer. Since the inner lining layer has a long circumference, it can be extended.

[0004] Although the above-mentioned existing technologies can improve the tensile strength of power cables, oily substances exist in many industrial and application environments. These oily substances may cause corrosion and damage to the cables, thereby affecting the electrical performance and mechanical strength of the cables. Therefore, they do not meet existing needs. In this regard, we propose an oil-resistant polytetrafluoroethylene power cable. Utility Model Content

[0005] The purpose of the utility model is to provide an oil-resistant polytetrafluoroethylene power cable to solve the problem of poor oil resistance of the power cable proposed in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an oil-resistant polytetrafluoroethylene power cable, comprising a cable core; three groups of spirally wound wire cores are provided inside the cable core, and the wire cores are composed of a conductor, an intermediate layer and an alloy layer; an insulating composite layer is provided outside the cable core, and the insulating composite layer is composed of a base layer, a reinforcement layer and an inner protective layer; a shielding combination layer is provided outside the insulating composite layer, and the shielding combination layer is composed of an anti-interference layer, an isolation layer and a reinforcement layer; and an outer sheath is provided outside the shielding combination layer.

[0007] Preferably, the conductor is formed by twisting a plurality of fine tinned copper wires, the intermediate layer is wrapped around the outside of the conductor, and the alloy layer is wound and fixed on the outer wall of the intermediate layer.

[0008] Preferably, the base layer is wrapped around the outside of the cable core by an extrusion process, a nanoparticle interlayer is provided between the base layer, the reinforcement layer and the inner protective layer, and the nanoparticle interlayer is fixed to the base layer, the reinforcement layer and the inner protective layer respectively by a polymer adhesive.

[0009] Preferably, a plurality of micropores are provided inside the base layer, the reinforcement layer and the inner protective layer, and the micropores are filled with porous ceramics.

[0010] Preferably, the anti-interference layer is wound on the outer wall of the inner protective layer, the isolation layer is wound on the outer wall of the anti-interference layer, and the reinforcement layer is fixed on the outer wall of the isolation layer by an adhesive.

[0011] Preferably, a filling layer is provided in the gap between the cable core and the wire core.

[0012] Preferably, the outer sheath is made of polytetrafluoroethylene.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model is provided with an insulating composite layer to ensure that the cable core maintains stable electrical performance and mechanical strength in an oily environment. Through the addition of a multi-layer composite structure and reinforced fibers, the tensile strength and wear resistance of the insulating layer are significantly improved, thereby extending the service life of the cable. The addition of nanoparticles and the selection of special oil-resistant materials enable the insulating layer to withstand higher temperatures and is suitable for high-temperature oily environments. At the same time, it ensures that the insulating layer has excellent electrical insulation properties and reduces the risk of electrical failures. The oil-absorbing material in the microporous structure can absorb and lock oily substances, reducing the penetration of oil into the insulating layer. At the same time, it has a certain self-repairing ability, thereby extending the maintenance cycle of the cable.

[0015] 2. The utility model is provided with a shielding combination layer, which can significantly improve the shielding ability of the cable against electromagnetic interference and protect the quality of signal transmission. The addition of high magnetic permeability materials enables the cable to more effectively shield high-frequency electromagnetic waves, and is suitable for application scenarios of high-speed data transmission and high-frequency signal transmission. The use of carbon nanotube composite materials enables the cable to have better flexibility and wear resistance while maintaining excellent shielding effect. The braided and wound combined structure not only improves the shielding effect, but also enhances the mechanical strength of the cable, making it more able to withstand external pressure and tension. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2This is a schematic diagram of the internal structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the insulating composite layer structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the shielding combination layer structure of the present utility model.

[0020] In the figure: 1. Cable core; 2. Wire core; 21. Conductor; 22. Intermediate layer; 23. Alloy layer; 3. Insulation composite layer; 31. Base layer; 32. Reinforcement layer; 33. Inner protective layer; 34. Nanoparticle interlayer; 35. Micropore; 4. Shielding combination layer; 41. Anti-interference layer; 42. Isolation layer; 43. Strengthening layer; 5. Outer sheath; 6. Filling layer. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] See also Figure 1-4 The utility model provides an embodiment: an oil-resistant polytetrafluoroethylene power cable, comprising a cable core 1; three groups of spirally wound wire cores 2 are provided inside the cable core 1, and the wire core 2 is composed of a conductor 21, an intermediate layer 22 and an alloy layer 23; an insulating composite layer 3 is provided outside the cable core 1, and the insulating composite layer 3 is composed of a base layer 31, a reinforcement layer 32 and an inner protective layer 33; a shielding combination layer 4 is provided outside the insulating composite layer 3, and the shielding combination layer 4 is composed of an anti-interference layer 41, an isolation layer 42 and a reinforcement layer 43; an outer sheath 5 is provided outside the shielding combination layer 4.

[0023] See also Figure 1 and Figure 2 The conductor 21 is made of multiple strands of fine tinned copper wires, the intermediate layer 22 is wrapped around the outside of the conductor 21, and the alloy layer 23 is wrapped and fixed on the outer wall of the intermediate layer 22. A filling layer 6 is provided in the gap between the cable core 1 and the wire core 2. The conductor 21 is made of tinned copper and is twisted by multiple strands of fine wires to increase the flexibility and fatigue resistance of the cable while ensuring good conductivity and oxidation resistance; the intermediate layer 22 is high-strength polyester fiber with high tensile strength and wear resistance, which enhances the mechanical strength of the wire core; the alloy layer 23 is silver-plated copper, which provides additional corrosion resistance, high temperature resistance or oil resistance to adapt to specific application environments; the wire cores 2 are spirally wound, and multiple layers of high-strength, corrosion-resistant stainless steel alloy are spirally wound around them, which enhances the mechanical strength of the wire core and improves its anti-interference ability.

[0024] See also Figure 2 and Figure 3, the base layer 31 is wrapped outside the cable core 1 by an extrusion process, a nano particle interlayer 34 is arranged between the base layer 31, the reinforcing layer 32 and the inner protective layer 33, and the nano particle interlayer 34 is fixed with the base layer 31, the reinforcing layer 32 and the inner protective layer 33 by a high polymer adhesive, the base layer 31 is modified polytetrafluoroethylene, which serves as an insulation layer and provides basic oil resistance and electrical insulation performance; the reinforcing layer 32 is glass fiber cloth, which improves the mechanical strength and wear resistance of the insulation layer; the inner protective layer 33 is polyimide film, which further enhances the oil resistance and chemical stability of the insulation layer; the nano particle interlayer 34 is nano aluminum oxide, which can significantly improve the oil resistance, heat resistance and electrical insulation performance of the insulation layer.

[0025] Please refer to Figure 3 , a plurality of micropores 35 are arranged in the base layer 31, the reinforcing layer 32 and the inner protective layer 33, and the micropores 35 are filled with porous ceramics, which further improves the oil permeability and self-repairing ability of the insulation layer.

[0026] Please refer to Figure 2 and Figure 4 , the anti-interference layer 41 is wound on the outer wall of the inner protective layer 33, the isolation layer 42 is wound on the outer wall of the anti-interference layer 41, and the reinforcing layer 43 is fixed on the outer wall of the isolation layer 42 by an adhesive, the anti-interference layer 41 is copper foil, which provides basic electromagnetic shielding effect and reduces the interference of external electromagnetic field on the internal signal of the cable; the isolation layer 42 is nickel-iron alloy, which further enhances the shielding ability of high-frequency electromagnetic waves; the reinforcing layer 43 is carbon nanotube composite material, which improves the flexibility and wear resistance of the cable while maintaining a certain shielding effect.

[0027] Further, the outer sheath 5 is made of polytetrafluoroethylene material, and the PTFE outer sheath can effectively prevent the erosion of oily substances to the inside of the cable, ensuring that the cable maintains stable electrical performance and mechanical strength in an oily environment. At the same time, its high electrical insulation can prevent current leakage and ensure the safe use of the cable. In addition, the heat resistance of PTFE enables the cable to work in high temperature environment for a long time without performance degradation. Moreover, the non-flammability and low smoke property of PTFE also improve the safety of the cable and reduce the risk of fire.

[0028] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but rather can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present application being indicated by the appended claims rather than by the above description, and it is intended to embrace all changes and modifications that fall within the meaning and scope of equivalents of the claims. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

Claims

1. An oil-resistant polytetrafluoroethylene power cable, comprising a cable core (1); characterized in that: The cable core (1) is provided with three groups of spirally wound wire cores (2) inside, the wire core (2) consisting of a conductor (21), an intermediate layer (22) and an alloy layer (23), the cable core (1) is provided with an insulating composite layer (3) outside, the insulating composite layer (3) consisting of a base layer (31), a reinforcement layer (32) and an inner sheath (33), the insulating composite layer (3) is provided with a shielding composite layer (4) outside, the shielding composite layer (4) consisting of an anti-interference layer (41), an isolation layer (42) and a reinforcement layer (43), and the shielding composite layer (4) is provided with an outer sheath (5) outside.

2. The oil-resistant polytetrafluoroethylene power cable according to claim 1, characterized in that: The conductor (21) is formed by twisting a plurality of fine tinned copper wires, the intermediate layer (22) is wrapped around the outside of the conductor (21), and the alloy layer (23) is wound and fixed on the outer wall of the intermediate layer (22).

3. The oil-resistant polytetrafluoroethylene power cable according to claim 1, characterized in that: The base layer (31) is wrapped around the outside of the cable core (1) through an extrusion process, and a nanoparticle interlayer (34) is provided between the base layer (31), the reinforcement layer (32), and the inner protective layer (33), and the nanoparticle interlayer (34) is fixed to the base layer (31), the reinforcement layer (32), and the inner protective layer (33) respectively through a polymer adhesive.

4. The oil-resistant polytetrafluoroethylene power cable according to claim 3, characterized in that: A plurality of micropores (35) are provided inside the base layer (31), the reinforcement layer (32) and the inner protective layer (33), and the micropores (35) are filled with porous ceramics.

5. The oil-resistant polytetrafluoroethylene power cable according to claim 1, characterized in that: The anti-interference layer (41) is wound on the outer wall of the inner protective layer (33), the isolation layer (42) is wound on the outer wall of the anti-interference layer (41), and the strengthening layer (43) is fixed on the outer wall of the isolation layer (42) by an adhesive.

6. The oil-resistant polytetrafluoroethylene power cable according to claim 1, characterized in that: A filling layer (6) is provided at the gap between the cable core (1) and the wire core (2).

7. The oil-resistant polytetrafluoroethylene power cable according to claim 1, characterized in that: The outer sheath (5) is made of polytetrafluoroethylene.

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